Hanger for electric-arc lamps



(No Model.)

T. H. BRADY. HANGER FOB. BLEGTRIG ARG LAMPS.

No. 560,255. Patented May 19, 1896.

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THOMAS II. BRADY, OF NEIV BRITAIN, CONNECTICUT.

HANGER FOR ELECTRIC-ARC LAIVIPS.

SPECIFICATION forming part of Letters Patent No. 560,255, dated May 19, 1896.

Application filed January 4:, 1896.

To all when@ it may concern:

Be it known that I, THOMAS H. BRADY, of New Britain, in Hartford county, Connecticut, have invented certain new and useful Improvements in Hangers for` Electric-Arc Lamps, which improvements are described in the following specification and are illustrated by the accompanying drawings.

This invention relates to those hangers for electric-arc lamps which perform the double function of supporting the lamp and of maintaining an electrical connection between the lamp and the line connections which are outside of the lamp.

The object of the invention is to produce a hanger of the specified class' which shall take hold of the lamp easily and let it go with dificulty and which shall at the same time preserve a superior electrical connection between the hanger and the lamp. To accomplish these objects I use two dependent-hooks, one to engage each terminal ring or hook of the lamp, and provide each of said dependent hooks with an electrically conductive spring, which is seated within the base of the hook and mechanically closes the mouth of the hook in a peculiar manner.

The best manner in which I have contemplated applying the principles of my invention is illustrated by said drawings, which include three figures.

Figure 1 is an under side view of a hangen vboard supplied with hangers, which are constructed in accordance with those principles. Fig. 2 is an enlarged longitudinal section through one of said hangers on the sectionline a: of Fig. 1. Fig. 3 is an enlarged plan view of the same hanger right side up.

The numeral 1 in Figs. 1 and 2 denotes a hanger-board of any ordinary or convenient description to which the lamp is to be attached. This board may be secured in the hood of a lamp in a horizontal position and with that side down which is presented to the observer in Fig. 1. Such a board is usually supplied with binding-posts or terminals 2 and 3 for line connection, with cut-out mechanism 4, with hangers G and 7, and with appropriate electrical connections between such binding-posts, hangers, and cut-out. These connections being located principally on the reverse side of the hanger-board are Serial No. 574,327. (No model.)

not shown in the drawings. The hanger 7, which is a duplicate of hanger G, is made of copper or other conductive material, and consists of a hollow base 8, an upturned hook 9,

a fiat spring 13, and a binding-post 10 for the y line-wire. The base S of this hanger, as shown in Figs. 2 and 3, has a longitudinal cavity 12 and two inwardly-projecting lips 14 and is attached to the hanger-board by screws 11. Spring 13 is inserted in cavity 12 and is normally held in the oblique position, which is shown in Fig. 2, by means of lips 14 and the contiguous screw 11. This spring stretches obliquely across the mouth of hook 9, and being perforated near its free end by a hole 5, which fits over the outer end of hook 9, effectually closes Ithe mouth of that hook, as shown in Figs. 2 and 3.

Such being the construction of my improved hanger, its mode of operation requires but little explanation. The two terminal hooks of the lamp-frame (not shown in the drawings) are inserted in hooks 9, respectively, by being pushed upward against the outer end portion of springs 13 and over the outer ends of hooks 9. In this operation spring 13 is vmomentarily raised to the position in which it is shown by dotted lines in Fig. 2. At all other times this spring presses down over the point of hook 9, and when that hook is occupied by one of the said terminal hooks of the lamp-frame this spring also presses downward upon that terminal hook,

holding it securely in place and completing` the electrical connection between such terminal hook and the base S of the hanger. This structure and mode of operation present two important advantages. The first advantage, already indicated, arises from the circumstance that the hook 9 and the spring 13 are in electrical contact with each other within base S. From this circumstance it follows that the electrical connection from the terminal lamp-hook, which is placed in hook 9, to the base of hook 9 is complete by the way of that hook and also by the way of spring 13, and this is accomplished without any intermediate conductor. The second of these advantages is mechanical, and arises from the described relative positions of spring 13 and hook 9. In hanging up the lamp less pressure is necessary to be exerted upward against IOO spring 13 than in the reverse operation of unhooking the lamp, for the reason that in the former case the pressure is exerted at a greater distance from the attached end of the spring. From this peculiarity it results that the lamp is more easily placed in position than displaced. In other words, the terminal hooks or rings ofthe lamp are more easily hooked onto the hangers than unhooked from them, which is the reverse of the ordinary construction. By reason of the described peculiarities the hanger takes hold of the lamp easily and lets it go with difficulty, and at the same time preserves a superior electrical connection between the terminal rings or hooks of the lamp and the bases of the hangers into which they are respectively hooked.

Such being the construction and operation of my improved hangers for electric-arc lamps, I claim as my inventionl. A hanger for an electric-arc lamp, consisting of a dependent hook, which is made of electrically conductive material, and is provided with a hollowT base, of like material, in combination with a flat spring, which is made of like material, is seated within said hollow base, and in electrical contact therewith, extends across the mouth of the hook, and is provided with a hole, located near the free end oi' said spring, and Iitting over the point of said hook, substantially as and for the purpose specified.

2. A hanger for an electric-arc lamp, consisting,` of a pair of dependent hooks, each of which is provided with a hollow base, and is composed of electrically conductive material, in combination with a spring, which is made of like material, is seated within said hollow base, and in electrical contact therewith, extends obliquely across the mouth of the hook` and is provided with a hole, located near the free end of said spring, and fitting' over the point of said hook, substantially as and for the purpose specified.

In testimony whereof l hereunto set my name in the. presence of two witnesses.

THOMAS Il. BRADY. lVitnesses:

RICHARD H. Marana, WILLARD EDDY. 

